Ukuhlanzeka komoya kuwuhlobo lwezinga lamazwe ngamazwe lokuhlukanisa elisetshenziswa ekamelweni elihlanzekile. Ngokuvamile yenza ukuhlolwa kwegumbi elihlanzekile nokwamukelwa ngokusekelwe esimweni esingenalutho, esimile nesiguquguqukayo. Ukuzinza okuqhubekayo kokuhlanzeka komoya nokulawula ukungcola kuyindinganiso eyinhloko yekhwalithi yegumbi elihlanzekile. Izinga lokuhlukanisa lingahlukaniswa libe yi-ISO 5(Class A/Class 100), ISO 6(Class B/Class 1000), ISO 7(Class C/Class 10000) kanye ne-ISO 8(Class D/Class 100000).
